HistoryThe following is taken from New York in the War of the Rebellion, 3rd ed.
Frederick Phisterer. Albany: J. B. Lyon Company, 1912.

Mustered in: October 30, 1861 as an artillery company of the 56th regiment
of infantry
Designated 7th battery, June 7, 1862
Mustered out: July 22, 1865

This battery was organized as an artillery company of the 10th Legion, 56th
N. Y. Volunteers, at Windsor, and mustered in the service of the United States
for three years October 30, 1861. It was recruited principally at Buttermilk
Falls, Ellenville, Haverstraw, Newburgh, Middletown, Poughkeepsie, Saugerties,
Tarrytown and Ashford, Mass.; December 7, 1861, it received its numerical designation;
June 7, 1862, some of the men of Battery A, 1st Artillery, were transferred
to it. At the expiration of its term of service, the men entitled thereto were
discharged, and the battery retained in service. It left the State, commanded
by Capt. Peter C. Regan, November 7, 1861, and served in Casey's Division, Army
of the Potomac, from November, 1861; in the 2d Division, 4th Corps, from March,
1862; at Camp Hamilton, Va., from July, 1862; at Norfolk, Va., 7th Corps, from
August, 1862; at Portsmouth, Va., from October, 1862; at Norfolk, Va., from
July, 1863; at Yorktown, Va., 18th Corps, from March, 1864; in the Artillery
Brigade of the 2d Division, 18th Corps, Army of the James,
from April, 1864; in the Artillery Brigade, 18th Corps, from June, 1864; in
the Artillery Brigade, 24th Corps, from December 2, 1864; in Ferrero's Division,
defenses of Bermuda Hundred, Va., from January, 1865. Commanded by Captain Regan,
the battery was mustered out and honorably discharged July 22, 1865, at Albany,
having during its service lost by death, killed in action, 2 enlisted men; of
wounds received in action, 1 enlisted man; of disease and other causes, 28 enlisted
men; total, 31.